Specifications

106 Chapter4
Tests
Test_16 Dual-Band Handover
Test_16 Dual-Band Handover
Description This test verifies that the mobile can successfully perform Dual-Band
Handover between the GSM900 and DCS1800 radio modes.
While operating in the GSM900 or DCS1800 radio mode, the mobile is
tested using the existing GSM900 and DCS1800 sets of specifications
and parameters. The Dual-Band Handover is executed according to the
ARFCN specified by parameter number 12, RT Default Traffic
Channel (see page 145), the value of which depends on the radio mode
the mobile is operating in at the time Dual-Band Handover occurs. The
Mobile TX level in the new band is set to the value read from parameter
number 31, TX Default Power Control Level. The Dual-Band
Handover uses the following hardcoded values for the Downlink
Amplitude:
• GSM BCH and TCH: -85 dBm
• DCS TCH: -85 dBm
• GSM BCH Attenuation: 20 dBm
NOTE Note that in test procedures including TEST_16 Dual-Band Handover,
it does not make sense to use the following tests after TEST_16: 1, 2, 3,
11, 12, 13 and 14. These tests will work under these conditions but if
the call is ended in the DCS band after a Dual-Band Handover, then it
is restarted in the GSM band.
NOTE When running a Dual-Band procedure it is recommended that you do
not change cards during the procedure.
NOTE Frequency hopping is not available as long as the Dual-Band procedure
is executed.
Specifications All of the existing specifications are used in GSM900 and DCS1800
radio modes before and after Dual-Band Handover occurs.
Parameters All of the existing GSM900 parameters are used before Dual-Band
Handover occurs. After Dual-Band Handover occurs and the mobile
switches radio mode, the Call Processing (CP) parameters (that is, the
parameters involved with setting up the call etc.) 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11 and parameters 14, 18 and 46 are redundant in the procedure for
the new radio mode as the call is already established. These parameter
values are left unchanged after the Dual-Band Handover occurs.